New Lexington, O marked M-4412 off the Chattanooga & Tennessee River Power Company's Hales Bar transmission line. The line was constructed in the 1909-1911 utilizing three-legged, Carnegie Steel towers. Each tower hosted two 44,000-volt, three-phase circuits with No.000 copper conductor and single static wire on top. The line was engineered with heavy, long-lasting construction and so this particular insulator design was chosen as a compliment to it. Two manufactures, R. Thomas, Sons & Co. and the New Lexington Porcelain Co. provided the line insulators and the Ohio Brass Co. the strain insulators (Remains undiscovered). Remains of iron tie wire clamps suggest that a heavy tie configuration was used. Evidently, every 5th tower had a storage building with additional M-4412 for fast repairs to retain reliable service. The line used pin-types until TVA re-insulated the towers using OB flange type suspensions in the 1920s. Shortly after, the line was replaced by TVA constructed lines set on a new ROW.

Several New Lexington glazes and markings have been found: Speckle red/tan/brown, metallic dark brown, and metallic purple marked with NEW LEXINGTON, O, small JOHNS-MANVILLE, and large JOHNS-MANVILLE.

Thomas glazes have been found in red, dark mahogany, and brown glazes with no THOMAS markings, only makers incluse.

In theory, the insulators were removed and hammered for the wrought iron pin. The pin-types were removed and replaced by suspension strings in the 1920s. Confusion starts when tower paint has been found on pieces that were once together and not broken when the tower was painted. Either the tower was painted as the insulators were replaced but before they were hammered, or the pieces found with the tower paint on the piece once together were broken even more when the line was abandoned and conductor scrapped, or the insulators laid underneath the towers until the company hammered them for the war effort, or paint dripped from painting the crossarm above the insulator onto the top, we may never know.